head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Pure Optimization
An immersive-sim RPG demanding intricate build optimisation and resource management aboard a hostile alien-infested starship.

Optimization · Pure Optimization
A movement-focused looter where build optimisation and endurance meet persistent drop-table variance grinds.
System Shock 2 leans Optimization (Pure Optimization); Warframe leans Optimization (Pure Optimization).
System Shock 2 leans a little harder on execution, though the gap is small.
System Shock 2
Weapon degradation and limited stats moderate the raw aim ceiling
Warframe
Movement and combo timing matter in endgame Steel Path content
Warframe leans a little harder on reads, though the gap is small.
System Shock 2
All enemies are scripted with fixed patrol and attack routines
Warframe
Cooperative PvE only; no adaptive human opponents
Warframe leans a little harder on variance, though the gap is small.
System Shock 2
Random loot locations and psi powers introduce run-to-run variance
Warframe
Relic cracking and mod drop RNG dominate progression
System Shock 2 leans a little harder on optimization, though the gap is small.
System Shock 2
Deep build tree and resource conservation define the entire skill ceiling
Warframe
Warframe builds and mission routing are extensively community-solved
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.